Aidan resurfaces to find the vampire community has changed a great deal. Meanwhile, Sally struggles to free herself from limbo; Josh and Nora stand up to Ray, and at the same time a new threat comes looking for them in Boston.

Sally flirts with an old acquaintance, while Aidan looks for blood and finds someone from his past. Elsewhere, Josh tries to decide whether to take the next step in his relationship with Nora, who comes in contact with a dangerous foe.

Nora and Josh wonder how to deal with a runaway teen; Sally tries to make things right with a ghost and meets a new love interest; and Aidan and Henry continue to look for clean blood.

Sally takes action to keep others safe, Aidan gets desperate and Nora takes Josh to meet the parents.

Liam is determined to turn Josh and Nora against Aidan, who has more immediate concerns when Kenny begins to suspect that Aidan is a vampire. Meanwhile, Sally and Max grow closer at the funeral home.

Sally seeks Donna's help to make things right after she has an accidental encounter with somebody from her past. Elsewhere, Josh finds being responsible for Erin a challenge; and Aidan is haunted by memories of Bishop.

Josh reconnects with his younger sister, while Sally spends time with an old friend who has changed a lot over the years. Elsewhere, a sexy vampire uses Kenny to get her hands on Aidan's clean blood supply.

Josh pops the question to Nora; Liam kidnaps and tortures Aidan; and Sally's body begins to decompose.

Aidan is on the brink of passing as a result of the virus. At the same time, Sally develops strange cravings. Elsewhere, Josh and Nora cross paths with an older hippie wolf.

Aidan makes a sacrifice to protect Josh and Nora; Aidan remembers his wife and son.

Josh encounters a vampire stripper as he and Nora search for Donna in hopes that she can put an end to the curse that's affecting Sally. Meanwhile, Aidan tries to make good on his promise to Kenny.

Aidan, Sally and Josh prepare to battle Donna; and Kenny awakens, but things don't work out as planned.

Josh and Nora face Liam; Sally deals with the outcome of her showdown with Donna; Aidan must deal with Kenny.